Understanding Your Bladder
Your bladder is a hollow, balloon-shaped organ made mainly of muscle. It stores urine, which is the liquid waste from your body made by your kidneys. The urine moves from the kidneys to the bladder through tubes called ureters. When it gets close to filled, your body sends a signal that you need to go to the bathroom. The bladder muscle then squeezes to help push the urine through the urethra out of your body.